<TITLE>prob017: Ramsey numbers</TITLE>
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<H1>prob017: Ramsey numbers</H1>

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<TR> <TD> proposed by
     <TD ALIGN=LEFT> <A HREF="http://www.cs.york.ac.uk/~tw">
          <B>Toby Walsh</B></A> 
          <ADDRESS><a href="mailto:tw@cs.york.ac.uk">
          tw@cs.york.ac.uk</a></ADDRESS>
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<H3> References </H3>

Many texts and articles discuss Ramsey theory. See, for example:

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        <LI> Graham, Ronald L. and Joel H. Spencer. Ramsey Theory. Scientific American July 1990: 112-117 
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        <LI>
Peterson, Ivars. Party Numbers. Science News v.17 July 1993: 46 
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Schur's lemma is closely related, and is described in 
<A HREF="../prob015/">prob015</A>.

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